FIRSTT PERIOD TODAY!! HEP!!?

im 11 and three quaters and this mornin i woke up and had bloood all in my pants, the schoo la few weeks ago had given all the girls a few samples so i used always silk pads, that worked fab and i checked up on my period twice in the school day. There was LOADS of blood though, thats ment to happen right? I have quite a few other pads aand i have found some more off my mums that she doesn't know she has!! So, im fine at the mo, then we went 2 tescos 2 get my dad a fathers day present, and i told my mum 2 get some pads just incase and she accidently picked up care free alo vera pantyliners, you canno use that for a period right?? so i can't telll my mum as we are not at all close, social servives and everything has been involved between us to so i can't tell her, and her period is a completly diffrent time 2 mine so she will buy pads all at the rong time!! i pretened 2 4get my pe kit 2day at skool but i can't do that 4 long. any suggestions??? and i wear joggers btw!! I can tell my gran but she lives about 50 miles away and i only c her once a week and she 2 has a loud mouth , atm im having no problems as its the end of the day however im scared il runo out of protection, i have alot but all the same. And ok any tps or anything stories watever can uu plz tell me plz thankuu. Oh and ive checked on the website beingirl its fab really helped me but t didnt asnwera ALL my questions. THNANKS ;p xx